<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <form action="" method="get" id="search" name="search" autocomplete="on">
        搜索<input type="text" id="user" name="user" />
        <input type="submit" value="搜索" />
    </form>
</body>

</html>